Faculty Profiles - ANDO, Kosei

Papers - ANDO, Kosei

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Analysis of shear creep properties of wood via modified Burger models and off‑axis compression test method Reviewed

Kanon Shimazaki, Kosei Ando

Wood Science and Technology Vol. 58 page： 1473 - 1490 2024

Variation of shear creep properties of wood within a stem: effects of macro‑ and microstructural variability Reviewed

Kosei Ando, Ryota Nakamura, Takashi Kushino

Wood Science and Technology Vol. 57 page： 93 - 110 2023

Dependence of Poisson's ratio and Young's modulus on microfibril angle (MFA) in wood Reviewed

Ando K., Mizutani M., Toba K., Yamamoto H.

Holzforschung Vol. 72 ( 4 ) page： 321-327 2018

Influence of a wide range of moisture contents on the Poisson's ratio of wood. Reviewed

Mizutani, M.; Ando, K.

Journal of Wood Science Vol. 61 ( 1 ) page： 81-85 2015

Time dependence of Poisson's effect in wood IV: influence of grain angle. Reviewed

Kawahara, K.; Ando, K.: Taniguchi, Y.

Journal of Wood Science Vol. 61 ( 4 ) page： 372-383 2015

Time dependence of Poisson's effect in wood III: asymmetry of three-dimensional viscoelastic compliance matrix of Japanese cypress. Reviewed

Ando, K.; Mizutani, M.; Taniguchi, Y.; Yamamoto, H.

Journal of Wood Science Vol. 59 ( 4 ) page： 290-298 2013

Effects of aging on the vibrational properties of wood Reviewed

Noguchi, T.; Obataya, E.; Ando, K.

Journal of Cultural Heritage Vol. 13 page： S21-S25 2012

*Determination of three-dimensional viscoelastic compliance in wood by tensile creep test. Reviewed

Taniguchi, Y.; Ando, K.; Yamamoto, H.

Journal of Wood Science Vol. 56 ( 1 ) page： 82-84 2010

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

The objective of this study is to extend the hitherto biaxial, two-dimentional approach to determination of the viscoelastic functions in wood to three dimensions, by making measurements to obtain all components of the viscoelastic compliance tensor concerning the normal strain. The three-dimensional discussion of wood's viscoelasticity has hardly been made, though wood has three axes of symmetry. In the present work, we determined the three-dimensional viscoelastic compliance concerning the normal strain in wood, by conducting the longitudinal-, tangential- and radial-tensile creep tests.

*Time dependence of Poisson's effect in wood I: the lateral strain behavior. Reviewed

Taniguchi, Y.; Ando, K.

Journal of Wood Science Vol. 56 ( 2 ) page： 100-106 2010

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

To understand the viscoelasticity of wood three-dimensionally, a longitudinal tensile creep test for twelve species was conducted to examine the changes with time in the lateral strain and the viscoelastic, i.e. apparent Poisson's ratio. The changes in the lateral strain (εT and εR) were similar to those in the longitudinal strain (εL). That is, during creep, the absolute value of lateral strain continued to increase with the gradual reduction in the increase rate; immediately after the removal of the load, it recovered abruptly; then, it recovered slowly and finally reached a certain value. The rate of increase in the longitudinal strain during creep was smaller than that in the absolute value of lateral strains. The apparent Poisson's ratio became large during creep because the lateral strain grew more than the longitudinal strain. The analysis of lateral strain by decomposition into three components, that is, the instantaneous strain, delayed elastic strain and permanent strain, has revealed that the lateral permanent strain in the transverse direction contributes most to the increase in the apparent Poisson's ratio during creep.

Time dependence of Poisson's effect in wood II: volume change during uniaxial tensile creep. Reviewed

Journal of Wood Science Vol. 56 ( 4 ) page： 350-354 2010

木材の物性を制御する微細構造の解析 Invited Reviewed

安藤幸世

TRACER ( 68 ) page： 2 - 5 2020.10

Recent studies on the Poisson's ratios of wood and wood-based materials Invited Reviewed

Kosei ANDO

Mokuzai Kogyo (Wood Industry) Vol. 66 ( 4 ) page： 144-149 2011

曲げ加工を利用した実演用製作教材 Reviewed

尾崎士郎、安藤幸世、内藤隆

木材工業 Vol. 66 ( 6 ) page： 279-283 2011

Fractography of old wood Reviewed

Kosei Ando, Azusa Takita, Yoshihiko Hirashima, Yasutoshi Sasaki

Nagoya University Forest Science ( 26 ) page： 1-7 2007.12

Microscopic processes of shearing fracture of old wood, examined using the acoustic emission technique. Reviewed

Ando, K.; Hirashima, Y.; Sugihara, M.; Hirao, S.; Sasaki, Y.

Journal of Wood Science Vol. 52 ( 6 ) page： 483-489 2006

Deformation behavior of wood under stress relaxation as cellular solids. Reviewed

page： 296-297 2005.7

木材のねじり疲労特性 Reviewed

安藤幸世, 山崎真理子, 渡辺純子, 佐々木康寿

木材学会誌 Vol. 51 ( 2 ) page： 98-103 2005

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

木材の繊維方向を軸とするねじり疲労特性について検討した。得られた結果は以下の通りである。応力レベルが30～100％の範囲では応力レベルと疲労寿命回数の対数とに負の直線関係があった。周波数が大きい方が疲労寿命回数の多い傾向にあった。１サイクル毎のエネルギ損失の平均値は疲労寿命回数が延びるにつれ或る一定値に収束する傾向が得られた。このときの応力レベルの限界値は疲れ限度と考えられ、およそ30％と予測した。

Near-infrared spectroscopic study of the physical and mechanical properties of wood with meso- and micro-scale anatomical observation. Reviewed

Tsuchikawa, S.; Hirashima, Y.; Sasaki, Y.; Ando, K.

Spectroscopy Vol. 59 ( 1 ) page： 86-93 2005

Characteristics of wood as a porous material. Invited Reviewed

Ando, K.

Materials Science and Technology Vol. 42 ( 3 ) page： 121-126 2005

古材の強度特性（第３報）, ケヤキおよびアカマツの静的曲げ強度特性および衝撃曲げ強さ Reviewed

平嶋義彦, 杉原未奈, 佐々木康寿, 安藤幸世, 山崎真理子

木材学会誌 Vol. 51 ( 3 ) page： 146-152 2005

Language：Japanese Publishing type：Research paper (scientific journal)

建築解体材より採取した古材の無欠点小試片を用いて静的曲げ強さ、曲げヤング率、衝撃曲げ強さを求め、新材の値と比較した。アカマツ古材の静的曲げ強さ、ヤング率は新材より増加するなどの結果が得られた。アカマツ古材は新材に比べて強度増加を示すものもあるが、同時に脆性的性質を帯びているように見受けられ、この性質は、破断面の長手方向に及ぶ長さの減少、比例限度比の増加などとして現れていると考えられた。

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